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Subject [GitHub] [drill] vvysotskyi commented on pull request #2092: DRILL-7763: Add Limit Pushdown to File Based Storage Plugins
Date Fri, 03 Jul 2020 08:37:56 GMT

vvysotskyi commented on pull request #2092:
URL: https://github.com/apache/drill/pull/2092#issuecomment-653427039


   @cgivre, how it would work for the case when there was created multiple fragments with
their own scan? From the code, it looks like every fragment would read the same number of
rows specified in the limit. Also, will the limit operator be preserved in the plan if the
scan supports limit pushdown?
   
   Metastore also provides capabilities for pushing the limit, but it works slightly differently
- it prunes files and leaves only minimum files number with specific row count. Would these
two features coexist and work correctly?


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